A kind of foamed graphene photothermal material and preparation method thereof

A technology of foamed graphene and graphene dispersion liquid, which is applied to ceramic products, other household utensils, household utensils, etc., can solve the problems of high production cost, complicated preparation process, poor wetting performance, etc., and achieve low cost and excellent preparation process. Simple, high light absorption effect

Active Publication Date: 2021-09-14
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, reports on porous graphene photothermal materials include: graphene aerogels with nanopores as the main structure (Hu X, Xu W, Zhou L, et al. Tailoring Graphene Oxide-Based Aerogels for Efficient Solar Steam Generation under One Sun.[J].Advanced Materials,2016,29(5)), due to the small pore size of this structure, the wettability of water to the entire material is poor, at 1KW / m 2 The photothermal conversion efficiency under sunlight intensity is only 56%; foamed graphene is also used as a photothermal material (Huaying Ren, Miao Tang, Baolu Guan, et al. Hierarchical Graphene Foam for Efficient Omnidirectional Solar–Thermal Energy Conversion[J]. Advanced Materials, 2017, 29 (38)), this technology uses foamed nickel as a template, although foamed graphene is prepared by plasma chemical vapor deposition method, but the preparation process is complicated and the production cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A foamed graphene photothermal material and a preparation method thereof. The preparation method described in this embodiment is:

[0019] 100 parts by mass of graphene oxide dispersion, 1 to 1.3 parts by mass of sodium dodecylsulfonate, 1 to 1.3 parts by mass of dodecyl alcohol and 1 to 1.3 parts by mass of resin glue are uniformly mixed at 40 to 52°C Mix to obtain a mixed solution; under the condition that the rotating speed is 1500-2000r / min, stir the mixed solution for 10-13min, then add 1-1.5 parts by mass of binder to the mixed solution under stirring, and continue to stir for 5- After 8 minutes, foam slurry is obtained; then the foam slurry is cast, freeze-dried for 10-14 hours, and finally dried at 80-90° C. for 18-20 hours to obtain a foamed graphene photothermal material.

[0020] In this embodiment: the concentration of the graphene oxide dispersion is 0.5-0.8 mg / mL; the binder is phenolic resin.

Embodiment 2

[0022] A foamed graphene photothermal material and a preparation method thereof. The preparation method described in this embodiment is:

[0023] 100 parts by mass of graphene oxide dispersion, 1.1 to 1.4 parts by mass of sodium dodecylsulfonate, 1.1 to 1.4 parts by mass of dodecyl alcohol and 1.1 to 1.4 parts by mass of resin glue are uniformly mixed at 44 to 56°C Mix to obtain a mixed solution; under the condition that the rotating speed is 1500-2000r / min, stir the mixed solution for 11-14min, then add 1.5-2.0 mass parts of binder to the mixed solution under stirring, and continue to stir for 6-20 minutes. After 9 minutes, the foam slurry is obtained; then the foam slurry is cast, freeze-dried for 12-16 hours, and finally dried at 80-90° C. for 20-22 hours to obtain a foamed graphene photothermal material.

[0024] In this embodiment: the concentration of the graphene oxide dispersion is 0.7-1.0 mg / mL; the binding agent described in the example is phenolic resin.

Embodiment 3

[0026] A foamed graphene photothermal material and a preparation method thereof. The preparation method described in this embodiment is:

[0027] 100 parts by mass of graphene oxide dispersion, 1.2 to 1.5 parts by mass of sodium dodecylsulfonate, 1.2 to 1.5 parts by mass of dodecyl alcohol and 1.2 to 1.5 parts by mass of resin glue are uniformly mixed at 48 to 60°C Mix to obtain a mixed solution; under the condition that the rotating speed is 1500-2000r / min, stir the mixed solution for 12-15min, then add 2-2.5 parts by mass of binder to the mixed solution under stirring, and continue to stir for 7-20 minutes. After 10 minutes, foam slurry is obtained; then, the foam slurry is cast and molded, freeze-dried for 14-18 hours, and finally dried at 80-90° C. for 22-24 hours to obtain a foamed graphene photothermal material.

[0028] In this embodiment: the concentration of the graphene oxide dispersion is 0.9-1.2 mg / mL; the binder is phenolic resin.

[0029] The foamed graphene ph...

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Abstract

The invention relates to a foamed graphene photothermal material and a preparation method thereof. Its technical scheme is: the graphene oxide dispersion liquid of 100 mass parts, the sodium dodecylsulfonate of 1~1.5 mass parts, the dodecyl alcohol of 1~1.5 mass parts and the resin glue of 1~1.5 mass parts in 40~ Mix uniformly at 60°C to obtain a mixed solution; stir the mixed solution for 10-15 minutes at a rotational speed of 1500-2000r / min, and then add 1-2.5 parts by mass of combined agent, continue to stir for 5-10 minutes; then pour into molding, freeze-dry for 10-18 hours, and dry at 80-100°C for 18-24 hours to obtain a foamed graphene photothermal material. The concentration of the graphene oxide dispersion is 0.5-1.2 mg / mL; the binder is phenolic resin or epoxy resin. The invention has simple preparation process and low cost; the prepared foamed graphene photothermal material has high water evaporation efficiency and high photothermal conversion efficiency.

Description

technical field [0001] The invention belongs to the technical field of photothermal conversion materials. In particular, it relates to a foamed graphene photothermal material and a preparation method thereof. Background technique [0002] Photothermal conversion technology refers to the process in which photothermal conversion materials are irradiated by sunlight, the crystal lattice and photon energy vibrate each other, the molecular vibration intensifies, the internal energy increases, and the temperature of the material increases, thereby converting light energy into heat energy. In the field of photothermal conversion technology, the solar steam generation system (Solar Steam Generation) is a very promising research direction at present. Quick and efficient evaporation. Porous graphene is the most widely used photothermal material in solar water vapor generation systems, which has the advantages of wide solar absorption range, high absorption rate and high photothermal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B26/12C04B26/14C04B38/10
CPCC04B26/122C04B26/14C04B38/10C04B14/024C04B24/16C04B24/02C04B24/24
Inventor 方伟赵雷张涛张文豪何漩陈辉李薇馨
Owner WUHAN UNIV OF SCI & TECH
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